![]() Meanwhile, the software is a web-based user agent if: It expands the functionality of a primary user agent or is launched by one.It interprets a declarative or procedural language that is used for the provision of a user interface.It must follow certain conditions according to Wiki. ![]() Not every software qualifies to be a user agent. The user agent family also includes consumer electronics, stand-alone applications, and operating system shells. These include media players, plug-in, and web browsers. This guide goes into detail about user agents and their types and discusses the most common user agents and the role they play in web scraping.Ī user agent is software that renders, facilitates, and retrieves web content for the end users. The web server uses this information and serves different operating systems, web pages, or web browsers. Think of it as a web browser saying “Hi, I am a web browser” to the web server. Thus, every browser has a distinct user agent.īasically, a user agent is a method for your browser to introduce itself to the web server. The content of this field is different for each browser. Whenever a browser connects to a website, it has a field for user agent in the HTTP header. While that may sound simple, understanding how user agents function can be a bit complicated. In its simplest form, a user agent is a line of text or string that identifies the browser to the web server. One of these things is a user agent, which your browser sends to every website you connect with. Other technical documents can be found at the W3C Web site.When you type a search query in your browser, you may be unaware of a lot of action that’s happening in the background. This document is part of a series of accessibility documents published byĪccessibility Guidelines are produced as part of theĪ list of current W3C Recommendations and The English version of this document is the authoritative version. Report errors in this document send other comments about this document to the public mailing archives Working Group's patent disclosure page in Patent disclosures relevant to this specification may be found on the (FAQ) about UAAG 1.0, implementation reports, and test suites). ![]() The UAWG also provides additional resources to support this document (e.g., TheĬhanges to this document is available on the Web. This enhances the functionality and interoperability of the Web.Īgent Accessibility Guidelines Working Group ( UAWG). W3C's role in making the Recommendation is toĭraw attention to the specification and to promote its widespread deployment. It is a stableĭocument and may be used as reference material or cited as a normative Guidelines 1.0." This document has been reviewed by W3C Members, the disabilityĬommunity, software developers, and other W3C groups and interested parties,Īnd has been endorsed by the Director as a W3C Recommendation. This is the 17 December 2002 Recommendation of "User Agent Accessibility This document series is maintained at the W3C. Other documents may supersede this document. This section describes the status of this document at the time of its This document (e.g., technologies for braille rendering) will be essential toĮnsuring Web access for some users with disabilities. In addition to helping developers of HTML browsers and media players, thisĭocument will also benefit developers of assistive technologies because itĮxplains what types of information and control an assistive technology mayĮxpect from a conforming user agent. Promote accessibility through its own user interface and through other internalįacilities, including its ability to communicate with other technologiesįurthermore, all users, not just users with disabilities, should findĬonforming user agents to be more usable. Of software that retrieve and render Web content. User agents include HTML browsers and other types This document provides guidelines for designing user agents that lower barriers to WebĪccessibility for people with disabilities (visual, hearing, physical,Ĭognitive, and neurological). This document is also available in these non-normative This document, which may include some normative corrections. Service Authors and Contributors: See acknowledgements. Guidelines 1.0 W3C Recommendation 17 DecemberĢ002 This version: Latest version: Previous version: Editors: Ian Jacobs, W3C
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